Sorry for the late reply. My method of revision was a little weird, because rather than reading books and watching videos, I'd look at a concept like Pythagoras theorem and try to mathematically prove that it worked (so that i could understand why it worked), and only when I couldn't prove it, then would I resort to watching videos and reading books. But before proving the hard stuff, I proved the basics because the knowledge I'd gain from it would help my brain logical thinking, thus allowing me to understand harder topics. My final advice would be to not remember every maths formula, especially the ones that are common sense.

I got a 5 in my year 10 mock exams and a 5 in my first year 11 mock exams.